Cell Transport

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What is cell transport?

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Cell transport refers to the movement of substances across the cell membrane, which can occur through passive or active mechanisms.

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What is passive transport?

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Passive transport is the movement of substances across a cell membrane without the use of energy, relying on concentration gradients.

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What is active transport?

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Active transport is the movement of substances against their concentration gradient, requiring energy (usually from ATP) to occur.

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What is facilitated diffusion?

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Facilitated diffusion is a type of passive transport that uses transport proteins to help move molecules, such as glucose, across the cell membrane.

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What is osmosis?

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Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

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What is an isotonic solution?

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An isotonic solution has the same solute concentration inside and outside of the cell, resulting in no net movement of water.

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What is a hypotonic solution?

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A hypotonic solution has a lower solute concentration outside the cell compared to the inside, causing water to enter the cell and potentially leading to swelling.

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What is a hypertonic solution?

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A hypertonic solution has a higher solute concentration outside the cell compared to the inside, causing water to leave the cell and potentially leading to shrinkage.

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What are membrane pumps?

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Membrane pumps are transport proteins that actively move molecules across the cell membrane against their concentration gradient, requiring energy.

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What is endocytosis?

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Endocytosis is an active transport process where cells engulf substances by wrapping them in a portion of the cell membrane, forming a vesicle.